How are update and select used in MySQL?

In MySQL, the update statement is used to modify data in a table, while the select statement is used to retrieve data from a table.

1. How to use the update statement:
2. Basic syntax: UPDATE table name SET column name1=value1, column name2=value2, … WHERE condition;
3. The statement “UPDATE students SET score=90 WHERE id=1;” will update the score of the student with id 1 in the students table to 90.
4. You can update using multiple columns and conditions, or you can update using subqueries.
5. How to use the SELECT statement:
6. Basic syntax: SELECT column1, column2, … FROM table_name WHERE condition;
7. The statement “SELECT name, age FROM students WHERE score > 80;” will choose the names and ages of students who scored greater than 80 from the student table.
8. You can use wildcard * to select all columns, perform calculations on data using aggregate functions, and join multiple tables using JOIN statements for complex queries.

It’s important to note that the update statement will modify the data in the table, while the select statement only retrieves data from the table without making any changes to it.